forked from lijiext/lammps
47 lines
1.2 KiB
HTML
47 lines
1.2 KiB
HTML
<HTML>
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<CENTER><A HREF = "http://lammps.sandia.gov">LAMMPS WWW Site</A> - <A HREF = "Manual.html">LAMMPS Documentation</A> - <A HREF = "Section_commands.html#comm">LAMMPS Commands</A>
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</CENTER>
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<HR>
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<H3>fix planeforce command
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</H3>
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<P><B>Syntax:</B>
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</P>
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<PRE>fix ID group-ID planeforce x y z
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</PRE>
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<UL><LI>ID, group-ID are documented in <A HREF = "fix.html">fix</A> command
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<LI>lineforce = style name of this fix command
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<LI>x y z = 3-vector that is normal to the plane
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</UL>
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<P><B>Examples:</B>
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</P>
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<PRE>fix hold boundary planeforce 1.0 0.0 0.0
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</PRE>
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<P><B>Description:</B>
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</P>
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<P>Adjust the forces on each atom in the group so that it's motion will
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be in the plane specified by the normal vector (x,y,z). This is done
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by subtracting out components of force perpendicular to the plane.
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</P>
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<P>If the initial velocity of the atom is 0.0 (or in the plane), then it
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should continue to move in the plane thereafter.
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</P>
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<P>The forces due to this fix are also imposed during an energy
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minimization, invoked by the <A HREF = "minimize.html">minimize</A> command.
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</P>
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<P><B>Restrictions:</B> none
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</P>
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<P><B>Related commands:</B>
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</P>
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<P><A HREF = "fix_lineforce.html">fix lineforce</A>
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</P>
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<P><B>Default:</B> none
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</P>
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</HTML>
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